1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright 2013 Matthew Garrett <mjg59@srcf.ucam.org>
4 */
5
6 #include <linux/acpi.h>
7 #include <linux/module.h>
8 #include <linux/platform_device.h>
9
10 MODULE_DESCRIPTION("Intel Smart Connect disabling driver");
11 MODULE_LICENSE("GPL");
12
smartconnect_acpi_probe(struct platform_device * pdev)13 static int smartconnect_acpi_probe(struct platform_device *pdev)
14 {
15 unsigned long long value;
16 acpi_handle handle;
17 acpi_status status;
18
19 handle = ACPI_HANDLE(&pdev->dev);
20 if (!handle)
21 return -ENODEV;
22
23 status = acpi_evaluate_integer(handle, "GAOS", NULL, &value);
24 if (ACPI_FAILURE(status))
25 return -EINVAL;
26
27 if (value & 0x1) {
28 dev_info(&pdev->dev, "Disabling Intel Smart Connect\n");
29 status = acpi_execute_simple_method(handle, "SAOS", 0);
30 }
31
32 return 0;
33 }
34
35 static const struct acpi_device_id smartconnect_ids[] = {
36 {"INT33A0", 0},
37 {"", 0}
38 };
39 MODULE_DEVICE_TABLE(acpi, smartconnect_ids);
40
41 static struct platform_driver smartconnect_driver = {
42 .probe = smartconnect_acpi_probe,
43 .driver = {
44 .name = "intel_smart_connect",
45 .acpi_match_table = smartconnect_ids,
46 },
47 };
48
49 module_platform_driver(smartconnect_driver);
50